I am with TFox on this one.
In the shop I work at during the season we see fewer Hoyts come in for repairs than any others.

That being said, regardless of which bow you choose, you should ensure that you have the highest quality string and cables on it. A set of string/cables that stretches or creeps is what will cause you to continually have to tune and tune again.
My personal preference is Vapor Trail. I have had the same set on my Trykon XL for the last 2 years. The bow has only lost about 2 lbs of draw weight and the cams are still in time.